Document x1ezD9EQVjpakex04bYx3RJEg

reptcmber 29, 1954 Mr. A. J. Baldwin Ivlr. X- XI* Sibyl Corporation 100 Park Avenue New York Cii>f *7 . '( Gentlemen: ! Tilfurther anIalytical report attached. hereto seems to addto the mystery of this situation, whichnow requires some further examination. You will hear i'rcmus later. Meanwhile, if you find any further evidence that bear3on tjih e situation, please let me hive it. . I Sincerely yours, rn> tA X l I X Enc# ! _S_ohJer&tjAJ.dgKxe_h_ce_,__M_-._D__. ____ HE 0010476 IN?ERPRSTATION The analytical results obtainedby thprocedure described onthe attached report are, to say the least, surprising. It will be noted with satisfaction, however, that they confirm the observations made inthe field, and that this hose is Significantly and dangerously contaminated, on its inside, by tetraethyl lead. It seems evident that the prior analyses made inthis Laboratory on the lead content of the hose failed to portray the entire situation, and that this hose (bothlengths of it) is muchmore heavily contaminated with tetraethyl lead at some point or points thancurprevious analyses indicated. Only by relatively great and spotty contamination, it seems, could the air flowing through it become as contaminated with volatile lead as it was foundto be. For this resson the hose will be cut longitudinally and its inner surface inspected, inthe hope of finding the source or sources of vaporisation :jf tetraethyl lead withthe air stream. Our calculations showthat approximately one third of all of the volatile lead contained in the hose (assuming that ail of that disclosed byour pre vious analyses was on the inner surface of the L. 2Sfoot length) was given upto the 4 cubic feet of air passed throughit and subjected to analysis, //ashing out the hose reduced the available volatile lead, but only by lass than Oper cent. The facts with reference to the 23 foot (plus) length of hose and its content of volatile lead (differed little fromthose of the iv.Sv foot length, and thus it seems that both lengths of hose were contaminated to about the same extent withtetraethyl lead. Itinternal contamination with inorganic lead was appreciablyless thanthat of the other length. Incontradiction of the interpretations arrived at ina previous report, it must be said frpmthe present results, (1) that this hose is contaminated withtetraethyl lead on its inner surface to a potentially dangerous extent, and (2) that no practical method suggests itself for cleaning up such hose, so as to render it suitable for further use. Because of the importance of this matter, &those lines will be investigated Snrth&r, so as to establish, if possible, the distribution oi the contamination onits inner surface. I, | Signed: September 18, il>ii 4 kT 00104177